If it were here 3600 years ago..how did some of the ancients survive it?

Quoting: Anonymous Coward 17629467

in freakin caves deep underground forget about trying to survive on the surface these peeps were already living in there any major type of civilization will be easily wiped out if this shit came true.

Quoting: Anonymous Coward 18375662

I asked the question cause people were saying it will be impossible to survive unless you are deep in sophisticated bunkers. But if it's true that it was here before then obviously you can survive with primitive means.